期刊
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
卷 134, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2021.105994
关键词
Photocatalysis; Zinc oxide nanorod; Silver nanoparticle; Pharmaceutical waste; Paracetamol
类别
资金
- Nanotechnology Research Center, Sultan Qaboos University, Oman
- Oman Telecommunication Company (Omantel) [EG/SQU-OT/19/02, IG/DVC/NRC/19/01]
- Sultan Qaboos University [EG/SQU-OT/19/02, IG/DVC/NRC/19/01]
The study showed that under visible light irradiation, ZnO-Ag catalyst exhibited higher photocatalytic activity in the degradation of paracetamol, possibly due to efficient charge separation, visible light absorption, and reduced recombination of electron and hole. Additionally, ZnO-Ag demonstrated high stability, with only a slight decrease in degradation performance after multiple cycles.
Visible light absorption enhanced silver nanoparticles (Ag NPs) decorated zinc oxide nanorods (ZnO NRs) were synthesized using microwave-assisted growth method and utilized as supported catalysts in degradation of pharmaceutical compound. The optimal concentration of silver nitrate precursor and annealing temperature for synthesized ZnO-Ag catalysts were investigated. Different concentrations (5-20 ppm) of paracetamol were used as test contaminant in photocatalytic degradation process. The highest photocatalytic degradation (92%) of 5 ppm paracetamol was achieved for ZnO-Ag in comparison to (54%) degradation for pristine ZnO after 4 h visible light irradiation. The stability of ZnO-Ag catalyst was also investigated. The degradation performance decreased only 2% for ZnO-Ag and 24% for pristine ZnO using 5 ppm paracetamol after four repeated cycles showing high ZnO-Ag stability. Enhanced photocatalytic activity of ZnO-Ag catalyst was due to efficient charge separation as well as visible light absorption and reduced recombination of electron and hole.
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